14 
BULLETIN 1434, U. S. DEPARTMENT OF AGRICULTURE 
In the experiment shown in Table 6, duplicate series of sprays 
were applied on a bog infected with Sclerotinia the preceding year, 
in the hope that one of them at least would cover a concurrent out- 
break of the disease. The plots extended entirely across the bog. 
The vines on the higher side of the bog bloomed two weeks in advance 
of those on the lower side, interfering greatly with the problem of 
applying the spray at given stages in the development of the plants. 
No Sclerotinia appeared. The average of rot in two samples is given 
in each case. 
Another unsuccessful attempt was made to catch an outbreak of 
Sclerotinia in the experiment shown in Table 7. 
Table 7. — Percentage of rot developing in storage in Bennett Jumbo cranberries 
from Fieselman bog, Columbia Beach, Or eg., in 1923 
I Berries were hand picked early in October, screened Nov. 5, and shipped to Portland, Oreg.,Nov. 6, 
The first spray was applied May 3, when new vine growth was starting, the second June 1 (hook stage), 
the third July 1 (after blossom'), and the fcurth July 20, when berries were one-hali to three-fourths 
grown. Homemade Bordeaux mixture 4-4-50 with fish-oil-soap spreader 2-50 was used] 
Date of examination of storage material 
Sprayed 
Checknot 
sprayed 
Sprayed 
Checknot 
sprayed 
21 
46 
7 
26 
Analysis of the preceding tables shows that spraying with Bordeaux 
mixture reduced the percentage of storage rot in all instances except 
those in which the first spray was put on after the blossoming period. 
In the latter case the keeping quality was sometimes improved to a 
lesser extent, but very little benefit was derived from the final spray 
alone. The percentage of rot was reduced approximately one-half in 
all plots receiving the spray at the hook stage. 
Table 8. — Percentage of rot developing in storage in cranberries experimentally 
sprayed in 1924 
[Berries were screened Nov. 10 and 11 and shipped to Portland, Oreg., Nov. 20] 
Sprayed with Bordeaux mixture 
Variety, bog, and date of examination of 
storage material 
First 
spray 
First 
and 
second 
sprays 
First, 
second, 
and 
third 
sprays 
Second 
spray 
Second 
and 
third 
sprays 
Third 
spray 
Check, 
Not 
sprayed 
McFarlin, Pilkington bog: i 
Nov. 10 (before screening) . 
8 
5 
4 
6 
7 
9 
18 
8 
6 
5 
6 
12 
9 
16 
25 
10 
11 
18 
22 
9 
12 
26 
31 
10 
Dec. 2 (after storage) 
13 
Bennett, Schimpff bog: 2 
Nov. 10 (before screening) 
21 
Dec. 2 (after storage). 
14 
12 
25 
30 
Searls, West bog: 3 
Nov. 10 (before screening) 
18 
Dec. 2 (after storage) 
29 
1 First spray applied June 12 at hook stage; commercial Bordeaux mixture, 4-4-50. Second spray 
applied July 29, after blossom; homemade Bordeaux mixture, 4-4-50; soap, 2-"0. Third spray applied 
Aug. 25; berries nearly grown; homemade Bordeaux mixture, 4-4-50; soap, 2-50. Hand picked Oct. 11 
to 16. 
2 First spray applied June 11 at hook stage; commercial Bordeaux mixture, 4-4-50. Second spray 
applied July 30; seme blossom, srme berries one-h;)lf grown; commercial Bordeaux mixture, 4-4-50. 
Third spray applied Aug. 22; berries one-half to three-fourths gruwn; commercial Bordeaux mixture 
4-4-50. Scooped Oct. 17 and 18. 
3 First spray applied June 11 at hook stage; homemade Bordeaux mixture, 4-4-50. Second spray ap- 
plied Aug. 1, after blossom. Scooped early in October. 
